A tree spade is a specialized machine that mechanizes the transplanting of large plants whose hand-powered transplanting (using [traditional] spades, wagons, and other equipment) would be prohibitively laborious. These include large bushes and small or medium trees. By bringing mechanized power to what was formerly only a manual process, tree spades do for transplanting what tractors and combine harvesters do for agriculture, and what excavators and other heavy equipment do for construction.
A typical machine consists of a number of blades that encircle the tree, digging into the ground and then lifting the entire tree, including its roots and soil, out of the ground.
Media related to [//commons.wikimedia.org/wiki/Category:Tree_spades Tree spades] at Wikimedia Commons